Complete with seam-sealed, functionally waterproof packbag and rolltop closure, the Arc'teryx Arrakis 40 Backpack ($400) protects your gear against the elements from a cross-country ski tour to a multi-pitch rock climb. Along with weather-resistant construction, this multi-sport crossover backpack features the Arc'teryx MonoFrame support system, padded hipbelt and GridLock adjustable shoulder strap system, a convenient full-length side access zipper, and a large kangaroo pocket with drain hole.